The week in pictures

A French police helicopter lifts an investigator from the crash site of a Germanwings airliner on March 26 in the mountains above Seyne-les-Alpes. The Germanwings Airbus 320 with 150 people on board slammed into the French Alps on March 24. Anne-Christine Poujoulat, AFP/Getty Images

Sen. Ted Cruz, R-Texas, waves to the crowd with wife Heidi and daughters Catherine, left, and Caroline after announcing he intends to run for the Republican nomination for president on March 23 at Liberty University in Lynchburg, Va. H. Darr Beiser, USA TODAY

People pray in front of a photograph of former Singapore prime minister Lee Kuan Yew on March 23 at the Tanjong Pagar community center in Singapore. Yew, 91, a major force in post-colonial Asian politics, died after being hospitalized since Feb. 5. Mohd Rasfan, AFP/Getty Images

Girl Scouts Alicia Cutter, left, Addy O'Neal, Emery Dodson, Karissa Cheng, and Emily Bergenroth meet President Obama before showing him their project during his tour of the White House Science Fair exhibits on March 23 at the White House in Washington. Jacquelyn Martin, AP

An Orthodox priest blesses the Soyuz TMA-16M spacecraft on March 26 at the Baikonur cosmodrome in Kazakhstan. The rocket is scheduled to carry a new crew to the International Space Station. Dmitry Lovetsky, AP